Abstract: The present invention belongs to the technical field of biomass carbon materials, and relates to a lignin porous carbon nanosheet, a preparation method therefor, and an application thereof in supercapacitor electrode materials. The method of the present invention performs layer-by-layer self-assembly of sulfonated lignin and oxalate in a selective solvent to prepare a layer-by-layer self-assembled lignin/oxalate composite, which is then carbonized and pickled to obtain the lignin porous carbon nanosheets. The lignin porous carbon nanosheets prepared by the above method of the present invention have a specific surface area of 200-1500 m2/g, a micropore specific surface area of 100-500 m2/g, a mesoporous specific surface area of 100-1000 m2/g, a pore diameter of 0.5-30 nm, and a pore volume of 0.5-1.5 cm3/g; they can be applied to supercapacitor electrode materials, showing higher specific capacitance and excellent rate performance (with a specific capacitance retention rate of 76.

Abstract: Raytracing can be used to generate high quality, physics-based water caustics patterns in real time. A caustics map is generate to represent locations and normals of points across a water surface. Rays from a light source that are reflected and refracted from these points, as determined by the locations and normals, and can generate hit points on a surface. Neighboring points can be used to help determine the resulting caustics pattern. In one embodiment, information for neighboring points in the caustics map can be used to generate scale factors for geometric regions to be projected onto the surface for each hit point. In another embodiment, these points serve as vertices of a caustic mesh that can be projected onto the surface, where the brightness at a primitive is determined by the size of the primitive area defined by the vertices of the caustics mesh.

Abstract: Raytracing can be used to generate high quality, physics-based water caustics patterns in real time. A caustics map is generate to represent locations and normals of points across a water surface. Rays from a light source that are reflected and refracted from these points, as determined by the locations and normals, and can generate hit points on a surface. Neighboring points can be used to help determine the resulting caustics pattern. In one embodiment, information for neighboring points in the caustics map can be used to generate scale factors for geometric regions to be projected onto the surface for each hit point. In another embodiment, these points serve as vertices of a caustic mesh that can be projected onto the surface, where the brightness at a primitive is determined by the size of the primitive area defined by the vertices of the caustics mesh.

Abstract: A target transaction to write off a target e-bill is received. In response to the target transaction, a write-off logic declared in a smart contract published on a blockchain is invoked. A bill number of the target e-bill is obtained, and whether the bill number matches an e-bill number segment maintained in a blockchain account corresponding to a bill issuer of the target e-bill is checked. In response to determining that the bill number matches the e-bill number segment maintained in the blockchain account corresponding to the bill issuer of the target e-bill, a validity check is performed on bill content of the target e-bill. After the validity check succeeds, generating a write-off completion event corresponding to the target e-bill is generated and published to the blockchain for storage.

Abstract: Raytracing can be used to generate high quality, physics-based water caustics patterns in real time. A caustics map is generate to represent locations and normals of points across a water surface. Rays from a light source that are reflected and refracted from these points, as determined by the locations and normals, and can generate hit points on a surface. Neighboring points can be used to help determine the resulting caustics pattern. In one embodiment, information for neighboring points in the caustics map can be used to generate scale factors for geometric regions to be projected onto the surface for each hit point. In another embodiment, these points serve as vertices of a caustic mesh that can be projected onto the surface, where the brightness at a primitive is determined by the size of the primitive area defined by the vertices of the caustics mesh.

Abstract: A data processing system includes a first data terminal, a second data terminal, and a data computing node, where the data computing node is separately in communication connection with the first data terminal and the second data terminal. The data computing node is provided with at least one data computing logic. A method for processing data at the data processing system includes: receiving, by the data computing node, a data computing call application sent by the second data terminal, where the data computing call application includes a query index for target service event data, obtaining the target service event data from the first data terminal based on the query index, running a data computing logic corresponding to the data computing call application, and performing data computing based on the target service event data to obtain a computing result, and sending the computing result to the second data terminal.

Abstract: Raytracing can be used to generate high quality, physics-based water caustics patterns in real time. A caustics map is generate to represent locations and normals of points across a water surface. Rays from a light source that are reflected and refracted from these points, as determined by the locations and normals, and can generate hit points on a surface. Neighboring points can be used to help determine the resulting caustics pattern. In one embodiment, information for neighboring points in the caustics map can be used to generate scale factors for geometric regions to be projected onto the surface for each hit point. In another embodiment, these points serve as vertices of a caustic mesh that can be projected onto the surface, where the brightness at a primitive is determined by the size of the primitive area defined by the vertices of the caustics mesh.

Abstract: This disclosure relates to blockchain-based reimbursement. In some aspects, a network node on a blockchain network receives a target transaction. The target transaction includes a target electronic bill identifier. In response to receiving the target transaction, expense splitting logic is invoked. The expense splitting logic is specified in a smart contract deployed on the blockchain Respective expense splitting notes are generated based on the expense splitting logic and an unreimbursed amount included in reimbursement information that is stored in the blockchain and that corresponds to the target electronic bill identifier. The respective expense splitting notes are broadcasted to the blockchain for storage.

Abstract: A computer-implemented method, non-transitory, computer-readable medium, and computer-implemented system is provided for obtaining a real-name electronic bill. In response to an association operation initiated by a user for a target electronic bill, an association transaction is published that includes an identifier of the target electronic bill, where the association transaction causes a network node on the blockchain to return identity association prompt information when determining that the target electronic bill stored in the blockchain is not associated with user identity information (UII). The UII is collected when receiving the identity association prompt information. The UII is sent to the network node, where the network node verifies whether the UII matches identity information of a payment user in the target electronic bill, and after verification succeeds, publishes an association relationship between the UII and the identifier of the target electronic bill to the blockchain for storage.

Abstract: A target transaction to write off a target e-bill is received. In response to the target transaction, a write-off logic declared in a smart contract published on a blockchain is invoked. A bill number of the target e-bill is obtained, and whether the bill number matches an e-bill number segment maintained in a blockchain account corresponding to a bill issuer of the target e-bill is checked. In response to determining that the bill number matches the e-bill number segment maintained in the blockchain account corresponding to the bill issuer of the target e-bill, a validity check is performed on bill content of the target e-bill. After the validity check succeeds, generating a write-off completion event corresponding to the target e-bill is generated and published to the blockchain for storage.

Abstract: A computer-implemented method, non-transitory, computer-readable medium, and computer-implemented system is provided for obtaining a real-name electronic bill. In response to an association operation initiated by a user for a target electronic bill, an association transaction is published that includes an identifier of the target electronic bill, where the association transaction causes a network node on the blockchain to return identity association prompt information when determining that the target electronic bill stored in the blockchain is not associated with user identity information (UII). The UII is collected when receiving the identity association prompt information. The UII is sent to the network node, where the network node verifies whether the UII matches identity information of a payment user in the target electronic bill, and after verification succeeds, publishes an association relationship between the UII and the identifier of the target electronic bill to the blockchain for storage.

Abstract: A target transaction to write off a target e-bill is received. In response to the target transaction, a write-off logic declared in a smart contract published on a blockchain is invoked. A bill number of the target e-bill is obtained, and whether the bill number matches an e-bill number segment maintained in a blockchain account corresponding to a bill issuer of the target e-bill is checked. In response to determining that the bill number matches the e-bill number segment maintained in the blockchain account corresponding to the bill issuer of the target e-bill, a validity check is performed on bill content of the target e-bill. After the validity check succeeds, generating a write-off completion event corresponding to the target e-bill is generated and published to the blockchain for storage.

Abstract: This document features a computer-implemented method that includes receiving, by a computing and recording node device in a blockchain system, a computing invoking application, the computing invoking application including a query index of target service event data. The method also includes obtaining the target service event data based on the query index of the target service event data, and obtaining a computing result by running a computing logic corresponding to the computing invoking application and performing computing based on the target service event data. The method further includes sending a blockchain transaction to the blockchain system. The blockchain transaction is recorded in a distributed database of the blockchain system after a consensus is achieved among consensus nodes of the blockchain system, and includes first recording information generated based on the computing result.

Abstract: A data processing system includes a first data terminal, a second data terminal, and a data computing node, where the data computing node is separately in communication connection with the first data terminal and the second data terminal. The data computing node is provided with at least one data computing logic. A method for processing data at the data processing system includes: receiving, by the data computing node, a data computing call application sent by the second data terminal, where the data computing call application includes a query index for target service event data, obtaining the target service event data from the first data terminal based on the query index, running a data computing logic corresponding to the data computing call application, and performing data computing based on the target service event data to obtain a computing result, and sending the computing result to the second data terminal.

Abstract: One or more implementations of the present specification provide a blockchain-based electronic bill reimbursement method, apparatus, and an electronic device. The blockchain stores electronic bills. The method includes determining whether a maintained target electronic bill is in an unreimbursed state in response to detecting a reimbursement transaction broadcasted by a reimbursement initiator for the target electronic bill to the blockchain; if the target electronic bill is in the unreimbursed state, updating the target electronic bill from the unreimbursed state to a reimbursement lock state; instructing a reimbursement acceptor to perform reimbursement processing on the target electronic bill; determining whether a reimbursement result corresponding to the target electronic bill is broadcasted by the reimbursement acceptor to the blockchain; and if the reimbursement result is detected, updating the target electronic bill from the reimbursement lock state to a reimbursed state.

Abstract: A computer-implemented method, non-transitory, computer-readable medium, and computer-implemented system is provided for obtaining a real-name electronic bill. In response to an association operation initiated by a user for a target electronic bill, an association transaction is published that includes an identifier of the target electronic bill, where the association transaction causes a network node on the blockchain to return identity association prompt information when determining that the target electronic bill stored in the blockchain is not associated with user identity information (UII). The UII is collected when receiving the identity association prompt information. The UII is sent to the network node, where the network node verifies whether the UII matches identity information of a payment user in the target electronic bill, and after verification succeeds, publishes an association relationship between the UII and the identifier of the target electronic bill to the blockchain for storage.

Abstract: Disclosed herein are methods, devices, and apparatuses, including computer programs stored on computer-readable media, for storing and processing electronic medical records. One of the methods includes: receiving, by a node in a blockchain system, an electronic medical record for a patient; incorporating the electronic medical record into a blockchain maintained by the blockchain system; determining, by the node, whether the electronic medical record contains a prescription; and in response to a determination that the electronic medical record contains a prescription, notifying the patient of the prescription.

Abstract: A computer-implemented method, non-transitory, computer-readable medium, and computer-implemented system are provided for applying a blockchain-based e-bill number. A blockchain includes multiple levels of accounts used to maintain e-bill number segments. An e-bill number application transaction published to the blockchain is received, where the e-bill number application transaction includes an account identifier of an account of a number applicant; allocating one or more e-bill numbers to the number applicant from an e-bill number segment maintained in an upper-level account corresponding to the account of the number applicant in response to the e-bill number application transaction; and adding the one or more e-bill numbers allocated to the number applicant to the account of the number applicant for maintenance.

Abstract: In an implementation of a computer-implemented method, a target transaction sent by a billing initiator is received, where the target transaction includes bill information of an e-bill to be issued. In response to the target transaction, check logic is invoked in a smart contract deployed in a blockchain network, and a validity check is performed on the bill information. If the validity check succeeds, allocation logic is invoked in the smart contract, and an e-bill number is allocated to the bill information from available e-bill number segments maintained in a blockchain account corresponding to a biller of the e-bill.

Abstract: The present specification provides blockchain-based state machine maintenance methods and apparatuses. In one implementation, the method includes: receiving, by a blockchain node, an operation transaction for a target electronic bill, wherein the blockchain node maintains a state machine corresponding to an electronic bill stored on a blockchain, wherein the state machine comprises multiple bill states in a life cycle of the electronic bill and operation data for triggering switching of the electronic bill from one bill state to another; in response to receiving the operation transaction, initiating a consensus process for the operation transaction; publishing consensus data related to the consensus process based on the operation transaction for the target electronic bill to the blockchain; determining monitored operation data matches the operation data in the state machine; and switching a bill state of the target electronic bill in the state machine based on the monitored operation data.